Well I broke down and decided to see what exactly China might have. Perhaps there's factories out there that can wind ballasts for 110v?
Sure can.
Almost immediately I have multiple manufacturers and suppliers through Alibaba who can deliver the desired ballasts in minimum quantities as low as 10 units which is enough to do what I want. I will have to fire off a few RFQ's and see what they come back with for pricing and freight rates but this may turn out to be the way to go.